Marketable Securities and Equity Investments - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Summary of cash, cash equivalents and marketable securities
Cash	$ 3,500,000,000		$ 3,500,000,000		$ 3,300,000,000
Net unrealized (losses) gains	(84,200,000)	$ 10,600,000	(159,800,000)	$ (41,700,000)
Allowance for credit loss for available-for-sale debt securities	0	$ 0	0	$ 0
Other Assets
Summary of cash, cash equivalents and marketable securities
Equity securities without readily determinable fair value, amount	$ 95,800,000		$ 95,800,000